• State Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 1 answer
  • Subscribers 52 subscribers
  • Views 3225 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

cc2541: ITU Emissions Class for cc2541

juan fernandez
Prodigy 80 points
Part Number: CC2541
Other Parts Discussed in Thread: CC2541

I am currently filling out an ETSI EN 300 328 Certification Document and am having a hard time figuring out the ITU Emissions Class for the cc2541. Specifically, placeholders 1, 2 and 4. Any help would be appreciated.

  • 0
    TI__Guru** 105180 points

    Please see section 2  "ETSI EN 300 328 V2.1.1 Requirement" in app note ETSI EN 300 328 Blocking Test for Bluetooth Low Energy (SWRA536)

    Also, as noted on the BLE wiki "How to certify" article:

    Note that BLE does not classify as FHSS under ETSI specification and instead classifies as other type of wideband modulation (See section 4.2.1 of the EN 300 328 specification). Relevant test requirements for BLE are defined in Sec. 4.3.2. Note that revision 1.9.1 of the test specification introduced a few new tests such as Medium Utilization factor and Duty Cycle, TX-Sequence and TX-Gap. These tests only applies to equipment with higher output power than 10 dBm. Bluetooth low energy devices are limited to 10 dBm output power in the EU due to the Power Spectral Density requirement (4.3.2.3) which limits the radiated PSD to 10 dBm/MHz. As such, all required testing for CE/ETSI can be performed with continuous (static) RF output such as for FCC testing.

    Best wishes

  • 0 in reply to JXS
    Prodigy 80 points
    Thank you for the reply but it did not answer my question. Let me try asking again with more detail. The testing house is asking for an ITU Emissions Class designator for our product. Our product is designed around the cc2541. The ITU Emissions Class is in the format BBB 123 45, see link below:

    www.radio-electronics.com/.../itu-designations-types-of-radio-emissions-transmissions.php

    I would think there would already be a designator published for the cc2541 as it has been around for a while. Is there anyone here who has certified a cc2541 based product and have the ITU Emissions Class? I am not an RF engineer so this is a bit out of my expertise.
  • 0 in reply to juan fernandez
    TI__Guru** 105180 points
    G1D should be sufficient for the encoding. The BLE signal is modulated, unless you allow your product to operate in test mode or proprietary.

    We have lots of certified products with CC2541, however, most labs fill this info in themselves. I'll add it to the wiki to make it easier to find.

    Best wishes
  • 0 in reply to JXS
    Prodigy 80 points
    JXS,

    Thank you very much.
  • 0 in reply to juan fernandez
    TI__Guru** 105180 points
    No problem, Juan! Please remember to kindly verify the answer so that I get paid :)

    Best wishes
  • 0 in reply to JXS
    TI__Guru** 106705 points
    Hi Juan,

    I do not think it really matters, but the BLE modulation is strictly speaking FM and not PM. So F1B is more accurate.

    Cheers,
    Fredrik
  • 0 in reply to Fredrik K
    Prodigy 80 points

    Fredrik,

    I had the same thought. Since BLE uses GFSK (a special case of Continuous Phase Modulation) I think I will go with the previous answer and see what the testing house says. Thank you for the input.